This internship report pertains to the assessment of sexual abuse allegations in children. Such offenses are by nature committed avoiding prying eyes, thus leaving few witnesses and little physical evidence to corroborate suspicions of abuse and complicates the investigation by making facts difficult to certify. Thus, only the victim and perpetrator are able to provide evidence to the inquiry. Known to deny or minimize his actions, the perpetrator rarely confirms allegations which often leaves the child’s voice as the sole source of evidence, one that needs to be treated with care. The investigative interview is therefore of vital importance for the protection of victims but also to prove the innocence or guilt of the alleged perpetrator. The objective of this work is to identify the narrative practices and characteristics of interviewers that optimize the interview in order to get the full story of the events with sufficient details. A systematic literature review, using specific inclusion criteria was conducted across three databases. Eleven studies were selected from this review. The main results show a positive association between the establishment of a support-based relationship and the amount of details revealed by the child. The analysis of the studies also permitted to highlight general findings and make recommendations for youth protection social workers on how best to conduct an interview. Such recommendations correspond to specific questioning techniques to consider for preserving the quality of the testimony of the child.